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Ceiling((n+1/2)^n).
4

%I #14 Sep 08 2022 08:45:59

%S 2,7,43,411,5033,75419,1334839,27249053,630249410,16288946268,

%T 465239139607,14551915228367,494696673952512,18161513224841276,

%U 716102966059713316,30181658957863752410,1354087807629298185930,64430442087414935111822,3240840189607299761533536

%N Ceiling((n+1/2)^n).

%H Vincenzo Librandi, <a href="/A197910/b197910.txt">Table of n, a(n) for n = 1..300</a>

%t Table[Ceiling[(n+1/2)^n],{n,20}] (* _Harvey P. Dale_, Sep 05 2015 *)

%o (Magma) [Ceiling((n+1/2)^n): n in [1..20]]

%o (PARI) a(n)=ceil((n+1/2)^n) \\ _Charles R Greathouse IV_, Nov 21 2011

%Y Cf. A014058.

%K nonn,less

%O 1,1

%A _Vincenzo Librandi_, Oct 19 2011